The Traffic of Session and SimpleX runs across 1000´s of relay. Do you really think thats more secure? They do NOT know hows behind all those relays. Can be hosted by AWS or Google and can easily collect all the metadata of their users. For example IP-Adresses. ONLY Threema does not collect any metadata or IP-Adresses. Look for your self: The centralization of Threema is a security feature. Session & SimpleX are (meta)data-spreader !

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Huh? Session is onion routed with different nodes. It's not google/AWS, I've done lookups on many of the IPs, its a lot of the same providers as Tor. SimpleX lets you self-host, so its you running it. Threema’s legal transparency report is not a technology solution, it’s their promise. Why is having different nodes with onion routing, or self-hosting simplex, worse metadata leak than just Threema’s promise?